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typedef const int cint;

typedef struct {

} Bounds;

int ndim_, ncomp_, selectedcomp_, nregions_;

void *voidregion_;

typedef struct {

    double diff, err, spread;

} Errors;

typedef const Errors cErrors;

void Split(int iregion, int depth, int xregion)

{

  typedef struct {

      double avg, err, spread, chisq;

      double xmin[ndim_], xmax[ndim_];

  } Result;

  typedef struct region {

      Result result[ncomp_];

  } Region;

  Errors errors[ncomp_];

  int comp, ireg, xreg;

  for( ireg = iregion, xreg = xregion; ireg < nregions_; ireg = xreg++ )

    {

      Result *result = ((Region *)voidregion_)[ireg].result;

      for( comp = 0; comp < ncomp_; ++comp )

        {

          Result *r = &result[comp];

          cErrors *e = &errors[comp];

          double c = e->diff;

          if( r->err > 0 ) r->err = r->err*e->err + c;

        }

    }

}